Pixel read circuitry
US8159587B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2008 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Sep 24, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/77
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of reading voltages from an image sensor having an array of pixels, each pixel Having at least one photodiode connectable to a storage node, the method including: controlling each pixel in a row of pixels to store and output a first voltage value at a first instance, a second voltage value at a second instance, and a third voltage value at a third instance, the first, second and third voltage values being representative of charge accumulated by the photodiodes during an integration phase; comparing the first voltage value from each pixel with a reference threshold; sampling for each pixel, based on the comparison, one of the second and third voltage values, and generating an output pixel value based on the sampled one of the second and third voltage values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.